[M2_hitam]

Hi guys,

here is my stock tune run datalog on Dyno with engine hood closed, i'm wondering is this too hot? because what i see from your reply you also have temperature around 120F? forgive me if i'm wrong. ambient temperature from my place usualy around 86 - 91F.

https://www.bootmod3.net/log?id=639a...0b431774f98c9d

please let me know from what you see at datalog

[AmuroRay]

Originally Posted by M2_hitam

Hi guys,

here is my stock tune run datalog on Dyno with engine hood closed, i'm wondering is this too hot? because what i see from your reply you also have temperature around 120F? forgive me if i'm wrong. ambient temperature from my place usualy around 86 - 91F.

https://www.bootmod3.net/log?id=639a...0b431774f98c9d

please let me know from what you see at datalog

For one thing, I would never dyno with the hood down, but yes that dyno shows REALY high IAT, with no timing issues, and REALLY HIGH boost: 30PSi and a 82% WGDC, and you're dynoing in 5th gear.

Are you on the stock turbo? Is this a N55? None of this makes sense.

[///393]

Originally Posted by AmuroRay

Can you post a log? I’m open to being wrong, this would be good news for him.

Yeah I can share some data to corroborate this. I have already but I’m not sure what’s easier, finding those posts or just pulling a log via BM3 this week.

This lines up with what I observe in real time with BimmerLink. After all the discussion I was expecting to see heat soak but that wasn’t the case.

[AmuroRay]

Originally Posted by wilson kop

Yeah I can share some data to corroborate this. I have already but I’m not sure what’s easier, finding those posts or just pulling a log via BM3 this week.

This lines up with what I observe in real time with BimmerLink. After all the discussion I was expecting to see heat soak but that wasn’t the case.

I had to search your name and came up with this thead:

https://f87.bimmerpost.com/forums/sh...8#post29287488

Just so I'm clear about my methodology:

OP committed to doing log, said between 3-4PM he would complete one, and posted it up. I checked the historic weather data for his location based on his profile:

The Log:

https://www.bootmod3.net/log?id=6311...90c6042bb34573

The Weather data:

https://www.timeanddate.com/weather/...th=9&year=2021

About 84F

So we have

106F starting - Aprox 22F over ambient
96F Ending - Aprox 12F over ambient
Runtime Approximately 12 seconds in 3rd gear

This is a VRSF 5" and 12-18F sounds reasonable, so believe you're right!

Still, please post a log if you have one - coming across them on this side of the forum is really difficult.

[///393]

Ambient temps climb back up this week here, so I’ll try to pull together some fresh data for the conversation. IATs definitely climb through each successive gear through longer pulls that’s for sure.

[M2_hitam]

Originally Posted by AmuroRay

For one thing, I would never dyno with the hood down, but yes that dyno shows REALY high IAT, with no timing issues, and REALLY HIGH boost: 30PSi and a 82% WGDC, and you're dynoing in 5th gear.

Are you on the stock turbo? Is this a N55? None of this makes sense.

Hi,

Yes this datalog i took when i'm doing custom tune and the hood closed because it's requested by the Dyno Operator to make a condition like a "real road". The dyno operator is reputable tuner here in Indonesia.

I think the PSI is in the absolute setting? so it have to reduce the number by 14psi-ish?

yesss it is a stock turbo and N55 F87

how high the IAT should be in good term with my ambient temperature? i do want to change the intercooler, but i'm affraid that will not help a lot for my case.

how high the timing ignition is good term with the 93 octane?

[AmuroRay]

I thought I responded - new intercooler, dyno hood open. Zero airflow at 100% load and stationary - worst case scenario, but also not realistic

[AmuroRay]

Originally Posted by wilson kop

Ambient temps climb back up this week here, so I’ll try to pull together some fresh data for the conversation. IATs definitely climb through each successive gear through longer pulls that’s for sure.

It must have been a multi year pull- most ICs can stabilize for a single gear - but not over the course of multiple. The VRSF 6.5 Competition (not Race) can get in 8F of ambient for a single gear pull, but it’s almost +
15F+ in a multiple gear pull - this is also with the most dense fin pack out there 18fins/inch) so I’d think a CSF would be slightly worse.

M2 guys do not like taking logs for whatever reason, and a lot of old links are broken, so it’s hard to compare and see, I have to operate of memory.

[///393]

Here is a video of my IAT and Boost gauges during a spirited canyon run for reference. Easier than fooling with my eNet cable for connectivity. This was taken after letting the car sit for a bit to heat soak the engine bay.

- 2017 N55B30T0 Powered M2
- BM3 S291 tune
- CSF Intercooler
- Active Autowerke Catted Downpipe
- Turner Chargepipe
- 65* fahrenheit ambient

I want to log an entire session on track but that proves to be a giant pain in the ass with a phone or laptop.

Hope this is interesting to someone.

[AmuroRay]

Well, It doesn’t say much, but it looks like your cruising and even a short WOT shot goes from a low of approx 14 above ambient to a high of 20f above during cruise and 30f above at what appears to be stop and go.

Here is a similar profile intercooler - 6.5 competition

This is a PWG, 40F ambient

https://x3.xbimmers.com/forums/showthread.php?t=1688931

Gear: 2nd 3rd 4th 5th (not complete)
Absolute temp peak (F) 54 46 54 61
Above ambient (F) 14 6 14 21


Here is an EWG (same IC, F30) 79F

https://f30.bimmerpost.com/forums/sh....php?t=1752195

Gear: 3rd 4th(not complete)
Absolute temp peak(F) 92 94
Above ambient (F) 13 15

[///393]

Originally Posted by AmuroRay

Well, It doesn’t say much, but it looks like your cruising and even a short WOT shot goes from a low of approx 14 above ambient to a high of 20f above during cruise and 30f above at what appears to be stop and go.

Canyon run up, over, and the down a small mountain. Definitely not cruising 😆 IAT drops as low as 78 under WOT which is 13 degrees above ambient.

I can go beat on it for an hour and it’ll do the same. Point is, 13 above ambient ain’t 20+

[AmuroRay]

Originally Posted by wilson kop

Canyon run up, over, and the down a small mountain. Definitely not cruising 😆 IAT drops as low as 78 under WOT which is 13 degrees above ambient.

I can go beat on it for an hour and it’ll do the same. Point is, 13 above ambient ain’t 20+

I watched it again, saw 78F for less than a second (and about 2-3seconds of WOT) You’re barely in boost - but 13F above ambient is literally 1 hero pull, and isn’t even a full WOT pull.

look again at what I posted.

[///393]

Originally Posted by AmuroRay

I watched it again, saw 78F for less than a second (and about 2-3seconds of WOT) You’re barely in boost - but 13F above ambient is literally 1 hero pull, and isn’t even a full WOT pull.

look again at what I posted.

This isn’t a log, it’s a screen recording of gauges which aren’t displaying data the same as you see it plotted on a log. You’d argue with a wall dude. You said CSF runs 20+ over ambient and I corrected you and then provided artifacts that demonstrated as much. That’s it.

When the car is under WOT with this setup temps drop down to 12-13 above ambient consistently and then creep back up slightly as expected through the gears. IATs will spike in normal driving around town as high as 30-40 over ambient but who cares when you put some boost in it they instantly drop back down to the range above which is all that matters. I could care less about my IAT as I pull into a parking garage.

[AmuroRay]

Originally Posted by wilson kop

This isn’t a log, it’s a screen recording of gauges which aren’t displaying data the same as you see it plotted on a log. You’d argue with a wall dude. You said CSF runs 20+ over ambient and I corrected you and then provided artifacts that demonstrated as much. That’s it.

Hmmm.

Originally Posted by AmuroRay

This is a VRSF 5" and 12-18F sounds reasonable, so believe you're right!

Still, please post a log if you have one - coming across them on this side of the forum is really difficult.

When the car is under WOT with this setup temps drop down to 12-13 above ambient consistently and then creep back up slightly as expected through the gears. IATs will spike in normal driving around town as high as 30-40 over ambient but who cares when you put some boost in it they instantly drop back down to the range above which is all that matters. I could care less about my IAT as I pull into a parking garage.

I actually gave you the benefit of the doubt and that’s with…whatever you provided me with.

If your pull is literally 2 seconds in one gear - no it doesn’t matter. If you never do a multiple gear pull - it doesn’t matter. If you don’t track, it doesn’t matter.

Point blank, I already told him the CSF is decent for what it is, and I’ll stand by my statement that it’s good for 15 -20F - above ambient, with the statement on multiple gear pulls, which is clearly what I must have saw.

[///393]

Originally Posted by AmuroRay

VRSF Race, MAD Race, and even BMS Race. They should be able to keep you within 10-15F over the ambient temps during a pull, which is pretty good.

Originally Posted by AmuroRay

From what I’ve seen with the CSF, it’s within 20F+ over ambient.

Originally Posted by AmuroRay

Can you post a log? I’m open to being wrong, this would be good news for him.

I show a CSF delivering IATs below that and all you can muster is:

Originally Posted by AmuroRay

I’ll stand by my statement that it’s good for 15 -20F - above ambient,

You have a funny way of saying “I was wrong” Ray.

[AmuroRay]

Originally Posted by wilson kop

I show a CSF delivering IATs below that and all you can muster is:



You have a funny way of saying “I was wrong” Ray.

Read my last post again - what do you think "you're right" means

[///393]

Originally Posted by AmuroRay

Read my last post again - what do you think "you're right means"

I went back and looked at old logs from fall ‘21 and historical weather and the best it could muster in those logs through full, 2-4 pulls was around 20* over ambient.

The more you pressurize the IC, the lower your IATs drop (duh) but what’s interesting to me is how you can manipulate results by starting from a lower IAT. Meaning, if I roll into full 3-4 pull after being off boost when IATs have climbed I see a higher delta than if you cheat em down with some boost and THEN hit a full 3-4 pull.

Unfortunately my closest, safest place to demonstrate this with data logs is crawling with losers with radar guns so I can’t support this with logs but once I started running an IAT & boost gauge and keeping an eye on em this really stood out.

[Sultan hamdi]

Check your map sensor is working properly

[M2_hitam]

Originally Posted by Sultan hamdi

Check your map sensor is working properly

Hi,

thank you for your reply, how do i check the map sensor is bad or not? i already tried to run diagnostic and there is no error code related the MAP Sensor. is there any other way to check it? please let me know

thank you.

[Sultan hamdi]

I got Different reading on the MAF versus actual plus I got deferent reading on both map sensors ie boost before turbo boost after turbo was deferent